As it happens, I've since splurged on that very smaller Mishi one to fit to my intake side.
This gives me existing strong reciprocating suction on the throttle near-closed side (pcv, original Mishi can with extra one way valve) for sitting in traffic and on the high flow rate side, cleaned intake suction with the new can on high load / boost.
Twin can. When I get to fitting it, I'll add to my thread of course. Possibly getting a bit overkill, but cans seem to work pretty well and in the scheme of things, not many cost units in terms of tanks of fuel. Clean air good. Oil in cans good